Updating a Health Check

Function

This API is used to update a health check.

Constraints

The health check can be updated only when the provisioning status of the associated load balancer is ACTIVE.

Calling Method

For details, see Calling APIs.

URI

PUT /v3/{project_id}/elb/healthmonitors/{healthmonitor_id}

**Table 1** Path Parameters
Parameter	Mandatory	Type	Description
healthmonitor_id	Yes	String	Definition: Specifies the health check ID. Constraints: N/A Range: N/A Default value: N/A
project_id	Yes	String	Definition: Specifies the project ID. For details about how to obtain a project ID, see Obtaining a Project ID. Constraints: N/A Range: The value can contain a maximum of 32 characters, including digits and lowercase letters. Default value: N/A

Request Parameters

**Table 2** Request header parameters
Parameter	Mandatory	Type	Description
X-Auth-Token	Yes	String	Definition: Specifies the token used for IAM authentication. Constraints: N/A Range: N/A Default value: N/A

**Table 3** Request body parameters
Parameter	Mandatory	Type	Description
healthmonitor	Yes	UpdateHealthMonitorOption object	Definition: Specifies the health check. Constraints: N/A

**Table 4** UpdateHealthMonitorOption
Parameter	Mandatory	Type	Description
admin_state_up	No	Boolean	Definition: Specifies the administrative status of the health check. Constraints: N/A Range: true: The health check function is enabled. false: The health check function is disabled. Default value: N/A
delay	No	Integer	Definition: Specifies the interval between health checks, in seconds. Constraints: N/A Range: 1 to 50 Default value: N/A
domain_name	No	String	Definition: Specifies the domain name that HTTP requests are sent to during the health check. Constraints: This parameter is available only when type is set to HTTP or HTTPS. Range: The value can contain only digits, letters, hyphens (-), and periods (.) and must start with a digit or letter. The value cannot be left blank, but can be specified as null or cannot be passed, indicating that the virtual IP address of the load balancer is used as the destination address of HTTP requests. Default value: N/A
expected_codes	No	String	Definition: Specifies the expected HTTP status code. Constraints: This parameter will take effect only when type is set to HTTP, HTTPS or GRPC. Range: A specific value, for example, 200 A list of values that are separated with commas (,), for example, 200, 202 A value range, for example, 200-204 Default value: N/A
http_method	No	String	Definition: Specifies the HTTP method. Constraints: This parameter is available when type is set to HTTP or HTTPS. Range: GET, HEAD, or POST Default value: GET
max_retries	No	Integer	Definition: Specifies the number of consecutive health checks when the health check result of a backend server changes from OFFLINE to ONLINE. Constraints: N/A Range: 1 to 10 Default value: N/A
max_retries_down	No	Integer	Definition: Specifies the number of consecutive health checks when the health check result of a backend server changes from ONLINE to OFFLINE. Constraints: N/A Range: 1 to 10 Default value: N/A
monitor_port	No	Integer	Definition: Specifies the health check port. Constraints: N/A Range: 1 to 65535, or null (the port of a backend server will be used by default). Default value: N/A
name	No	String	Definition: Specifies the health check name. Constraints: N/A Range: N/A Default value: N/A
timeout	No	Integer	Definition: Specifies the maximum time required for waiting for a response from the health check, in seconds. Constraints: N/A Range: It is recommended that you set the value less than that of parameter delay. Default value: N/A
url_path	No	String	Definition: Specifies the HTTP request path for the health check. The value must start with a slash (/), and the default value is /. Constraints: This parameter is available only when type is set to HTTP or HTTPS. Range: The value can contain letters, digits, hyphens (-), slashes (/), periods (.), percentage signs (%), question marks (?), pound signs (#), ampersand signs (&), and the extended character set: _;~!()[]@$^:',+. Default value*: N/A
type	No	String	Definition: Specifies the health check protocol. Constraints: If the protocol of the backend server is QUIC, the value can only be UDP_CONNECT. If the protocol of the backend server is UDP, the value can only be UDP_CONNECT. If the protocol of the backend server is TCP, the value can only be TCP, HTTP, or HTTPS. If the protocol of the backend server is HTTP, the value can only be TCP, HTTP, HTTPS, GRPC, or TLS. If the protocol of the backend server is HTTPS, the value can only be TCP, HTTP, HTTPS, GRPC, or TLS. If the protocol of the backend server is GRPC, the value can only be TCP, HTTP, HTTPS, GRPC, or TLS. If the protocol of the backend server is TLS, the value can only be TCP, HTTP, HTTPS, GRPC, or TLS. Range: The value can be TCP, UDP_CONNECT, HTTP, HTTPS, GRPC, or TLS. Default value: N/A

Response Parameters

Status code: 200

**Table 5** Response body parameters
Parameter	Type	Description
request_id	String	Definition: Specifies the request ID. Range: The value is automatically generated, and can contain characters including digits, lowercase letters, and hyphens (-).
healthmonitor	HealthMonitor object	Definition: Specifies the health check.

**Table 6** HealthMonitor
Parameter	Type	Description
admin_state_up	Boolean	Definition: Specifies the administrative status of the health check. Range: true: The health check function is enabled. false: The health check function is disabled.
delay	Integer	Definition: Specifies the interval between health checks, in seconds. Range: 1 to 50
domain_name	String	Definition: Specifies the domain name that HTTP requests are sent to during the health check. Range: The value can contain only digits, letters, hyphens (-), and periods (.) and must start with a digit or letter.
expected_codes	String	Definition: Specifies the expected HTTP status code. Range: A specific value, for example, 200 A list of values that are separated with commas (,), for example, 200, 202 A value range, for example, 200-204
http_method	String	Definition: Specifies the HTTP method. Range: GET, HEAD, or POST
id	String	Specifies the health check ID. Default value: N/A
max_retries	Integer	Definition: Specifies the number of consecutive health checks when the health check result of a backend server changes from OFFLINE to ONLINE. Range: 1 to 10
max_retries_down	Integer	Definition: Specifies the number of consecutive health checks when the health check result of a backend server changes from ONLINE to OFFLINE. Range: 1 to 10
monitor_port	Integer	Definition: Specifies the health check port. Range: 1 to 65535, or null (the port of a backend server will be used by default).
name	String	Definition: Specifies the health check name. Range: N/A
pools	Array of PoolRef objects	Specifies the IDs of the backend server groups for which the health check is configured. Only one ID will be returned. Range: N/A
project_id	String	Definition: Specifies the project ID. Range: N/A
timeout	Integer	Definition: Specifies the maximum time required for waiting for a response from the health check, in seconds. Range: N/A
type	String	Definition: Specifies the health check protocol. Range: The value can be TCP, UDP_CONNECT, HTTP, HTTPS, GRPC, or TLS.
url_path	String	Definition: Specifies the HTTP request path for the health check. The value must start with a slash (/), and the default value is /. Range: The value can contain letters, digits, hyphens (-), slashes (/), periods (.), percentage signs (%), question marks (?), pound signs (#), ampersand signs (&), and the extended character set: _;~!()*[]@$^:',+.
created_at	String	Definition: Specifies the creation time. Range: The value must be a UTC time in the format of yyyy-MM-dd'T'HH:mm:ss'Z'. Note: This parameter will not be returned for resources associated with existing dedicated load balancers and for resources associated with existing and new shared load balancers.
updated_at	String	Definition: Specifies the update time. Range: The value must be a UTC time in the format of yyyy-MM-dd'T'HH:mm:ss'Z'. Note: This parameter will not be returned for resources associated with existing dedicated load balancers and for resources associated with existing and new shared load balancers.

**Table 7** PoolRef
Parameter	Type	Description
id	String	Definition: Specifies the backend server group ID. Range: N/A

Example Requests

Modifying the interval between health checks

PUT https://{ELB_Endpoint}/v3/99a3fff0d03c428eac3678da6a7d0f24/elb/healthmonitors/c2b210b2-60c4-449d-91e2-9e9ea1dd7441

{
  "healthmonitor" : {
    "name" : "My Healthmonitor update",
    "max_retries" : 10,
    "delay" : 10
  }
}

Example Responses

Status code: 200

Successful request.

{
  "request_id" : "08d6ffea-d092-4cfa-860a-e364f3bef1be",
  "healthmonitor" : {
    "monitor_port" : null,
    "id" : "c2b210b2-60c4-449d-91e2-9e9ea1dd7441",
    "project_id" : "99a3fff0d03c428eac3678da6a7d0f24",
    "domain_name" : null,
    "name" : "My Healthmonitor update",
    "delay" : 10,
    "max_retries" : 10,
    "pools" : [ {
      "id" : "488acc50-6bcf-423d-8f0a-0f4184f5b8a0"
    } ],
    "admin_state_up" : true,
    "timeout" : 30,
    "type" : "HTTP",
    "expected_codes" : "200",
    "url_path" : "/",
    "http_method" : "GET"
  }
}

SDK Sample Code

The SDK sample code is as follows.

Modifying the interval between health checks

      
       
         
         
           package com.huaweicloud.sdk.test;

import com.huaweicloud.sdk.core.auth.ICredential;
import com.huaweicloud.sdk.core.auth.BasicCredentials;
import com.huaweicloud.sdk.core.exception.ConnectionException;
import com.huaweicloud.sdk.core.exception.RequestTimeoutException;
import com.huaweicloud.sdk.core.exception.ServiceResponseException;
import com.huaweicloud.sdk.elb.v3.region.ElbRegion;
import com.huaweicloud.sdk.elb.v3.*;
import com.huaweicloud.sdk.elb.v3.model.*;


public class UpdateHealthMonitorSolution {

    public static void main(String[] args) {
        // The AK and SK used for authentication are hard-coded or stored in plaintext, which has great security risks. It is recommended that the AK and SK be stored in ciphertext in configuration files or environment variables and decrypted during use to ensure security.
        // In this example, AK and SK are stored in environment variables for authentication. Before running this example, set environment variables CLOUD_SDK_AK and CLOUD_SDK_SK in the local environment
        String ak = System.getenv("CLOUD_SDK_AK");
        String sk = System.getenv("CLOUD_SDK_SK");
        String projectId = "{project_id}";

        ICredential auth = new BasicCredentials()
                .withProjectId(projectId)
                .withAk(ak)
                .withSk(sk);

        ElbClient client = ElbClient.newBuilder()
                .withCredential(auth)
                .withRegion(ElbRegion.valueOf("<YOUR REGION>"))
                .build();
        UpdateHealthMonitorRequest request = new UpdateHealthMonitorRequest();
        request.withHealthmonitorId("{healthmonitor_id}");
        UpdateHealthMonitorRequestBody body = new UpdateHealthMonitorRequestBody();
        UpdateHealthMonitorOption healthmonitorbody = new UpdateHealthMonitorOption();
        healthmonitorbody.withDelay(10)
            .withMaxRetries(10)
            .withName("My Healthmonitor update");
        body.withHealthmonitor(healthmonitorbody);
        request.withBody(body);
        try {
            UpdateHealthMonitorResponse response = client.updateHealthMonitor(request);
            System.out.println(response.toString());
        } catch (ConnectionException e) {
            e.printStackTrace();
        } catch (RequestTimeoutException e) {
            e.printStackTrace();
        } catch (ServiceResponseException e) {
            e.printStackTrace();
            System.out.println(e.getHttpStatusCode());
            System.out.println(e.getRequestId());
            System.out.println(e.getErrorCode());
            System.out.println(e.getErrorMsg());
        }
    }
}

          

        

      
     

Modifying the interval between health checks

      
       
         
         
           # coding: utf-8

import os
from huaweicloudsdkcore.auth.credentials import BasicCredentials
from huaweicloudsdkelb.v3.region.elb_region import ElbRegion
from huaweicloudsdkcore.exceptions import exceptions
from huaweicloudsdkelb.v3 import *

if __name__ == "__main__":
    # The AK and SK used for authentication are hard-coded or stored in plaintext, which has great security risks. It is recommended that the AK and SK be stored in ciphertext in configuration files or environment variables and decrypted during use to ensure security.
    # In this example, AK and SK are stored in environment variables for authentication. Before running this example, set environment variables CLOUD_SDK_AK and CLOUD_SDK_SK in the local environment
    ak = os.environ["CLOUD_SDK_AK"]
    sk = os.environ["CLOUD_SDK_SK"]
    projectId = "{project_id}"

    credentials = BasicCredentials(ak, sk, projectId)

    client = ElbClient.new_builder() \
        .with_credentials(credentials) \
        .with_region(ElbRegion.value_of("<YOUR REGION>")) \
        .build()

    try:
        request = UpdateHealthMonitorRequest()
        request.healthmonitor_id = "{healthmonitor_id}"
        healthmonitorbody = UpdateHealthMonitorOption(
            delay=10,
            max_retries=10,
            name="My Healthmonitor update"
        )
        request.body = UpdateHealthMonitorRequestBody(
            healthmonitor=healthmonitorbody
        )
        response = client.update_health_monitor(request)
        print(response)
    except exceptions.ClientRequestException as e:
        print(e.status_code)
        print(e.request_id)
        print(e.error_code)
        print(e.error_msg)

          

        

      
     

Modifying the interval between health checks

      
       
         
         
           package main

import (
	"fmt"
	"github.com/huaweicloud/huaweicloud-sdk-go-v3/core/auth/basic"
    elb "github.com/huaweicloud/huaweicloud-sdk-go-v3/services/elb/v3"
	"github.com/huaweicloud/huaweicloud-sdk-go-v3/services/elb/v3/model"
    region "github.com/huaweicloud/huaweicloud-sdk-go-v3/services/elb/v3/region"
)

func main() {
    // The AK and SK used for authentication are hard-coded or stored in plaintext, which has great security risks. It is recommended that the AK and SK be stored in ciphertext in configuration files or environment variables and decrypted during use to ensure security.
    // In this example, AK and SK are stored in environment variables for authentication. Before running this example, set environment variables CLOUD_SDK_AK and CLOUD_SDK_SK in the local environment
    ak := os.Getenv("CLOUD_SDK_AK")
    sk := os.Getenv("CLOUD_SDK_SK")
    projectId := "{project_id}"

    auth := basic.NewCredentialsBuilder().
        WithAk(ak).
        WithSk(sk).
        WithProjectId(projectId).
        Build()

    client := elb.NewElbClient(
        elb.ElbClientBuilder().
            WithRegion(region.ValueOf("<YOUR REGION>")).
            WithCredential(auth).
            Build())

    request := &model.UpdateHealthMonitorRequest{}
	request.HealthmonitorId = "{healthmonitor_id}"
	delayHealthmonitor:= int32(10)
	maxRetriesHealthmonitor:= int32(10)
	nameHealthmonitor:= "My Healthmonitor update"
	healthmonitorbody := &model.UpdateHealthMonitorOption{
		Delay: &delayHealthmonitor,
		MaxRetries: &maxRetriesHealthmonitor,
		Name: &nameHealthmonitor,
	}
	request.Body = &model.UpdateHealthMonitorRequestBody{
		Healthmonitor: healthmonitorbody,
	}
	response, err := client.UpdateHealthMonitor(request)
	if err == nil {
        fmt.Printf("%+v\n", response)
    } else {
        fmt.Println(err)
    }
}

          

        

      
     